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Proceedings Paper

Efficiency Of Rare-Earth Phosphors As A Function Of Temperature
Author(s): Douglas R Shearer; Stephen Kimball
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Paper Abstract

The x-ray to light conversion efficiencies of several commercially available screens were determined over a temperature range of 0 - 50°C using 80 kVp x-rays generated from a diagnostic fluoroscopic x-ray unit. The efficiencies of the rare-earth screens investigated (LaBrO:Tb & La2C2S/Gd202S:Tb) varied by less than 5% over this temperature range whereas that of the conventional screen (BaPb604) dropped to approximately 60% of the value at 00C. This slight temperature dependence for the terbium activated phosphors is ascribed to the weak coupling of the host crystal lattice with the inner electron shells involved in the luminescence transitions.

Paper Details

Date Published: 15 June 1984
PDF: 6 pages
Proc. SPIE 0454, Application of Optical Instrumentation in Medicine XII, (15 June 1984); doi: 10.1117/12.939328
Show Author Affiliations
Douglas R Shearer, Rhode Island Hospital (United States)
Stephen Kimball, Our Lady of Lourdes Hospital (United States)

Published in SPIE Proceedings Vol. 0454:
Application of Optical Instrumentation in Medicine XII
Samuel J. Dwyer; Roger H. Schneider, Editor(s)

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